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Tag: "pool" at biology news

Envisat captures first image of Sargassum from space

... computing is that anything one computer can do, a pool of computers can do faster and better, enabling the solution of massively complex tasks beyond the capabilities of a single machine or local network. By using Grid technology, Gower and King intend to compute 5-years worth of MERIS data to determ...

Physicist cracks women's random but always lucky choice of X chromosome

...nd paternal X chromosome are preserved in the gene pool and the resultant population thus has more chance of surviving any biological threat targeted at a single version of the X chromosome....

New findings challenge established views on human genome

... may indicate that many species’ genomes contain a pool of functional elements, including RNA transcripts,...fits in terms of survival or reproduction. As this pool turns over during evolutionary time, researchers speculate it may serve as a “warehouse for natural ...

Mutating the entire genome

...lops. “If we now improve that 10,000-fold, the pool of cells [with translocated chromosomes] may be large enough to create a mouse that develops the cancer,” so the new method makes it easier to breed mice with human cancers, Capecchi says. ‘Jumping Genes’ Help Make More Mutant DNA Wu and Cap...

Human stem cell treatment restores motor function in paralyzed rats

...fting new spinal stem cells, which repopulates the pool of degenerated neurons.” For this study, nine of 16 rats with induced spinal cord ischemia were injected with human spinal stem cells 21 days after paralysis. The other seven were injected with medium that contained no stem cells. The recovery o...

Master regulatory gene of epithelial stem cells identified

...al. Some studies found that p63 maintains a steady pool of the regenerative cells, while other studies argued that p63 has more to do with causing the cells to differentiate into particular types of tissue. The study, which was lead by Frank McKeon, PhD, professor of cell biology at Harvard Medical School...

The quest for an effective HIV vaccine presents new possibilities, challenges

...ng-term HIV infection may close permanently once a pool of latently infected cells is in place, Drs. Johnston and Fauci note. Neutralizing antibodies, which can attach to and eliminate free virus, only appear after HIV levels have declined substantially. Further, the effectiveness of these antibodies is s...

Scientists seek useful traits in wild cottons

...al of useful traits lying undiscovered in the gene pool or germplasm of obsolete and wild cottons containe...ctions. These traits could help diversify the gene pool from which breeders draw new varieties in the future. The U.S. Department of Agriculture's ...

Manipulating nature: Scientists query wildlife birth-control method

... engineering: "Immunocontraception alters the gene pool of the targeted species because those animals who are unresponsive are genetically unusual individuals," he says. "The job of the immunological system is to combat disease-causing organisms. But there is a danger that the selected minority might ...

Researcher to study astronaut bone loss for space biology agency

...er two Fellows were chosen from among a nationwide pool of applicants. "The loss of mechanical forces on bone in the weightlessness of space dramatically weakens bone," says Long. "The ability of humans to conduct prolonged missions to the moon and Mars will require that the structural integrity of the...

Twin studies reveal genetic components leading to cardiac and kidney disease

... Heredity and Kidney Disease The same twin pool study revealed the influence of heredity on renal protein (albumin) excretion. Excretion of the protein albumin in urine is one sign of kidney disease, which can be a complication of diabetes. "Normally kidneys filter the blood to rid the body o...

Out of Africa -- Bacteria, as well

...c bottlenecks: when a population shrinks, the gene pool also becomes smaller. These losses in genetic diversity linger, even when the population starts once again to increase in number. Since the Homo sapiens populations usually had to pass through several genetic bottlenecks on their way across the globe...

Flavanols in cocoa may offer benefits to the brain

...n are paralleled by an increase in the circulating pool of nitric oxide, a critical molecule in the circulatory system that helps dilate blood vessels and keeps them pliable. Hollenberg fed flavanol-rich cocoa to healthy volunteers who were over age 50 and observed a “striking blood flow response?that e...

Reminding doctors which antibiotics to prescribe cuts C. difficile infection rates

...interventions in other hospitals would enhance the pool of good quality evidence on the best ways to change antibiotic prescribing. It would also enable meaningful comparisons between studies and interventions. The paper is intended to be an example of best practice for reporting such studies. Guideli...

Microbes compete with animals for food by making it stink

...ically used for bait -- that had been rotting in a pool of warm water ?some of it for one day and the rest for two days. They also baited other traps with freshly thawed menhaden, which contained relatively few microbes. Then they set the traps in the marshes near Skidaway Island and caught hundreds of st...

Genome archaeology illuminates the genetic engineering debate

...ss species in general," Messing said. "The vast pool of genetic material in plants can be an important resource from which biotechnology can draw genes for insertion into an array of plants, generating unique genomes not achievable by conventional breeding," Messing said. "We could engineer plants to p...

Who gives stem cells their marching orders?

... attach to the wall of the uterus, to expand their pool of stem cells, and to let individual cells know where they are with respect to their neighbors. However, to carry out these tasks, the Nodal protein must be cleaved by specific enzymes. The enzymes act as a sort of regulatory switch, increasing the s...

Researchers in Montréal and the US create model of key immune-system component

...s research in Québec and Canada have enabled us to pool our resources and apply promising new approaches like systems biology." As Dr. Stuart explains, "Phagocytes are immune system cells that internalize, kill, and digest bacteria within an intracellular compartment called the phagosome, a major battl...

Climate experts search for answers in the oceans

...ments and allow researchers from various fields to pool their efforts in an attempt to understand how the climate is reacting to changes. "Clues to climatic changes may already be written on the oceans?surface. Because we now have detailed data that allow us to look for correlations, we are learning how ...

Caterpillars tell us how bacteria cause disease

...ns of species worldwide, insects provide a massive pool of hosts for bacterial diseases. The immune system of insects is very similar to the inborn immune system of mammals. By living first in insects some bacteria have evolved to survive immune system attack, so when they invade mammals they are equipped...

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